Cape Naturaliste Lighthouse on Cape Naturaliste, Western Australia. Cape Naturaliste is a headland in the south western region of Western Australia at the western edge of the Geographe Bay. Cape Naturaliste is also the site of a lighthouse. It was built in 1903 from locally quarried limestone. It is a 20 m high cylindrical tower built of limestone that still uses its original first order Fresnel lens made by Chance Brothers.